Photoelectrical encoder

ABSTRACT

The device consists of a detector for the modulation and recognition of position-dependent modulated light (L) to indicate length or angle. It comprises a transparent glass bearer-plate (6) on which a touch-section (3) and, on the opposite side, several photodiodes (7.1-7.4) are fixed. On their light-receiving side the photodiodes have terminals for making direct electrical contact with guideways (8). The detector can be moved in the direction of the scale (5). Signals identify accurately the position of the production tool relative to the item being worked.



